Telephone handset



"April 10, 1934. o. WEEBER TELEPHONE HANDSET Filed April 17, 1931 UTTEwe ab 2:-

Eng-

Patented Apr. 10, 1934 UNITED STATES PATENT OFFICE TELEPHONE HANDSETGermany Application April 17, 1931, Serial No. 530,853 In Germany July19, 1930 2 Claims.

The invention relates to a telephone handset with built-in circuitswitching springs which, when the handset is suspended, are operated bythe weight of the handset.

The object of the invention is to produce a particularly simple andsuitable arrangement for the operation of the switching springs and,according to the invention, this is achieved by the operatingmember ofthe switching springs being influenced by the fork of the suspensionhook sup; porting the receiver casing when the handset is suspended.

Due to this arrangement the construction of the handset is particularlysimplified and an advantageous suitable position for the switch memberof the switch is obtained.

According to the invention the operating member is located on the insideof the handset at the junction between the handle and the receivercasing. When so located the switch member is in a particularly favorableposition for its operation by the suspension hook and is protectedagainst unintentional operation during the handling of the instrument asthe hand cannot come into touch therewith.

The invention will be more fully described below in conjunction with adrawing.

The illustrated embodiment in Fig. 1 shows the upper part of such ahandset when suspended and Fig. 2 a similar view of this part whenremoved from the hook.

The casing 2, arranged at the upper part of the handle 1, is areceptacle for the receiver (not shown) as well as the contact springs 3for the automatic switch member. In the lower wall of the telephonecasing 2 at a point 4 where this joins the handle 1, the switch member5, operating the contact springs 3 of the switch, is movably fitted. Itsmovements are limited in both directions by stops or the like. In orderto obtain a favorable position for the switch member 5 against unin- Vtentional operation the point 4, at which the handle 1 joins thetelephone casing 3, a channel is formed which is purposely madeinaccessible to prevent the user from touching the switch member 5 whengripping the handset.

When the handset is suspended a switch member 5 rests with itsprojecting part on the fork shaped end of the hook 6 which is so widethat it 5 furnishes a good support for the handle. The switch member 5is thereby pressed inwards and actuates the middle contact of the set ofsprings 3 of the component representing the switchhook. In order to makethe forked end of the hook 6 easy for the replacement of the handset thechannel 4 is wedge shaped at the supporting point for the switch member5, whereby a reliable operation of the switch member is obtained.

When the handset is lifted up, the switch member 5 moves outwards (Fig.2). Being so short that it does not project over the front edge of thecasing 2, it cannot be reached by the users hand and is therebyprotected against unintentional operation. As will be seen, thedescribed and 30 shown construction constitutes a particularly suitableand simple arrangement for handsets of this type.

What is claimed is:

1. In a telephone handset, circuit-switching springs, a button foractuating said springs, said button being located in a channel formedjointly by the handset handle and the receiver casing.

2. In a telephone handset, switching springs, and a button for actuatingsaid springs located in a channel of the handset, which protects thebutton against inadvertent operation when the handset is in use.

OTTO WEEBER.

